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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">select_matching_lines</span><span data-if="c" style="display:none;">select_matching_lines</span><span data-if="cpp" style="display:none;">SelectMatchingLines</span><span data-if="dotnet" style="display:none;">SelectMatchingLines</span><span data-if="python" style="display:none;">select_matching_lines</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">select_matching_lines</span><span data-if="c" style="display:none;">select_matching_lines</span><span data-if="cpp" style="display:none;">SelectMatchingLines</span><span data-if="dotnet" style="display:none;">SelectMatchingLines</span><span data-if="python" style="display:none;">select_matching_lines</span></code> — Select those lines from a set of lines (in HNF) which
fit best into a region.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>select_matching_lines</b>(<a href="#RegionIn"><i>RegionIn</i></a> : <a href="#RegionLines"><i>RegionLines</i></a> : <a href="#AngleIn"><i>AngleIn</i></a>, <a href="#DistIn"><i>DistIn</i></a>, <a href="#LineWidth"><i>LineWidth</i></a>, <a href="#Thresh"><i>Thresh</i></a> : <a href="#AngleOut"><i>AngleOut</i></a>, <a href="#DistOut"><i>DistOut</i></a>)</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>select_matching_lines</b>(const Hobject <a href="#RegionIn"><i>RegionIn</i></a>, Hobject* <a href="#RegionLines"><i>RegionLines</i></a>, double <a href="#AngleIn"><i>AngleIn</i></a>, double <a href="#DistIn"><i>DistIn</i></a>, const Hlong <a href="#LineWidth"><i>LineWidth</i></a>, const Hlong <a href="#Thresh"><i>Thresh</i></a>, double* <a href="#AngleOut"><i>AngleOut</i></a>, double* <a href="#DistOut"><i>DistOut</i></a>)</code></p>
<p>
<code>Herror <b>T_select_matching_lines</b>(const Hobject <a href="#RegionIn"><i>RegionIn</i></a>, Hobject* <a href="#RegionLines"><i>RegionLines</i></a>, const Htuple <a href="#AngleIn"><i>AngleIn</i></a>, const Htuple <a href="#DistIn"><i>DistIn</i></a>, const Htuple <a href="#LineWidth"><i>LineWidth</i></a>, const Htuple <a href="#Thresh"><i>Thresh</i></a>, Htuple* <a href="#AngleOut"><i>AngleOut</i></a>, Htuple* <a href="#DistOut"><i>DistOut</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>SelectMatchingLines</b>(const HObject&amp; <a href="#RegionIn"><i>RegionIn</i></a>, HObject* <a href="#RegionLines"><i>RegionLines</i></a>, const HTuple&amp; <a href="#AngleIn"><i>AngleIn</i></a>, const HTuple&amp; <a href="#DistIn"><i>DistIn</i></a>, const HTuple&amp; <a href="#LineWidth"><i>LineWidth</i></a>, const HTuple&amp; <a href="#Thresh"><i>Thresh</i></a>, HTuple* <a href="#AngleOut"><i>AngleOut</i></a>, HTuple* <a href="#DistOut"><i>DistOut</i></a>)</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>::<b>SelectMatchingLines</b>(const HTuple&amp; <a href="#AngleIn"><i>AngleIn</i></a>, const HTuple&amp; <a href="#DistIn"><i>DistIn</i></a>, Hlong <a href="#LineWidth"><i>LineWidth</i></a>, Hlong <a href="#Thresh"><i>Thresh</i></a>, HTuple* <a href="#AngleOut"><i>AngleOut</i></a>, HTuple* <a href="#DistOut"><i>DistOut</i></a>) const</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>::<b>SelectMatchingLines</b>(double <a href="#AngleIn"><i>AngleIn</i></a>, double <a href="#DistIn"><i>DistIn</i></a>, Hlong <a href="#LineWidth"><i>LineWidth</i></a>, Hlong <a href="#Thresh"><i>Thresh</i></a>, double* <a href="#AngleOut"><i>AngleOut</i></a>, double* <a href="#DistOut"><i>DistOut</i></a>) const</code></p>
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<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>SelectMatchingLines</b>(<a href="HObject.html">HObject</a> <a href="#RegionIn"><i>regionIn</i></a>, out <a href="HObject.html">HObject</a> <a href="#RegionLines"><i>regionLines</i></a>, <a href="HTuple.html">HTuple</a> <a href="#AngleIn"><i>angleIn</i></a>, <a href="HTuple.html">HTuple</a> <a href="#DistIn"><i>distIn</i></a>, <a href="HTuple.html">HTuple</a> <a href="#LineWidth"><i>lineWidth</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Thresh"><i>thresh</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#AngleOut"><i>angleOut</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#DistOut"><i>distOut</i></a>)</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>.<b>SelectMatchingLines</b>(<a href="HTuple.html">HTuple</a> <a href="#AngleIn"><i>angleIn</i></a>, <a href="HTuple.html">HTuple</a> <a href="#DistIn"><i>distIn</i></a>, int <a href="#LineWidth"><i>lineWidth</i></a>, int <a href="#Thresh"><i>thresh</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#AngleOut"><i>angleOut</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#DistOut"><i>distOut</i></a>)</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>.<b>SelectMatchingLines</b>(double <a href="#AngleIn"><i>angleIn</i></a>, double <a href="#DistIn"><i>distIn</i></a>, int <a href="#LineWidth"><i>lineWidth</i></a>, int <a href="#Thresh"><i>thresh</i></a>, out double <a href="#AngleOut"><i>angleOut</i></a>, out double <a href="#DistOut"><i>distOut</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>select_matching_lines</b>(<a href="#RegionIn"><i>region_in</i></a>: HObject, <a href="#AngleIn"><i>angle_in</i></a>: MaybeSequence[float], <a href="#DistIn"><i>dist_in</i></a>: MaybeSequence[float], <a href="#LineWidth"><i>line_width</i></a>: int, <a href="#Thresh"><i>thresh</i></a>: int) -&gt; Tuple[HObject, Sequence[float], Sequence[float]]</code></p>
<p>
<code>def <b>select_matching_lines_s</b>(<a href="#RegionIn"><i>region_in</i></a>: HObject, <a href="#AngleIn"><i>angle_in</i></a>: MaybeSequence[float], <a href="#DistIn"><i>dist_in</i></a>: MaybeSequence[float], <a href="#LineWidth"><i>line_width</i></a>: int, <a href="#Thresh"><i>thresh</i></a>: int) -&gt; Tuple[HObject, float, float]</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p>Lines which fit best into a region can be selected from a set of lines which
are available in HNF with the help of 该算子
<code><span data-if="hdevelop" style="display:inline">select_matching_lines</span><span data-if="c" style="display:none">select_matching_lines</span><span data-if="cpp" style="display:none">SelectMatchingLines</span><span data-if="com" style="display:none">SelectMatchingLines</span><span data-if="dotnet" style="display:none">SelectMatchingLines</span><span data-if="python" style="display:none">select_matching_lines</span></code>; the region itself is also transmitted
as a parameter (<a href="#RegionIn"><i><code><span data-if="hdevelop" style="display:inline">RegionIn</span><span data-if="c" style="display:none">RegionIn</span><span data-if="cpp" style="display:none">RegionIn</span><span data-if="com" style="display:none">RegionIn</span><span data-if="dotnet" style="display:none">regionIn</span><span data-if="python" style="display:none">region_in</span></code></i></a>). The width of the lines can be
indicated by the parameter <a href="#LineWidth"><i><code><span data-if="hdevelop" style="display:inline">LineWidth</span><span data-if="c" style="display:none">LineWidth</span><span data-if="cpp" style="display:none">LineWidth</span><span data-if="com" style="display:none">LineWidth</span><span data-if="dotnet" style="display:none">lineWidth</span><span data-if="python" style="display:none">line_width</span></code></i></a>. The selected lines will
be returned in HNF and as regions (<a href="#RegionLines"><i><code><span data-if="hdevelop" style="display:inline">RegionLines</span><span data-if="c" style="display:none">RegionLines</span><span data-if="cpp" style="display:none">RegionLines</span><span data-if="com" style="display:none">RegionLines</span><span data-if="dotnet" style="display:none">regionLines</span><span data-if="python" style="display:none">region_lines</span></code></i></a>).
</p>
<p>The lines are selected iteratively in a loop: At first, the line showing
the greatest overlap with the input region is selected from the set of
input lines. This line will then be taken over into the output set whereby
all points belonging to that line will not be considered in the further
steps determining overlaps. The loop will be left when the maximum overlap
value of the region and the lines falls below a certain threshold value
(<a href="#Thresh"><i><code><span data-if="hdevelop" style="display:inline">Thresh</span><span data-if="c" style="display:none">Thresh</span><span data-if="cpp" style="display:none">Thresh</span><span data-if="com" style="display:none">Thresh</span><span data-if="dotnet" style="display:none">thresh</span><span data-if="python" style="display:none">thresh</span></code></i></a>). The selected lines will be returned
as regions as well as in HNF.</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  <li>未经并行化处理。</li>
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="RegionIn" class="parname"><b><code><span data-if="hdevelop" style="display:inline">RegionIn</span><span data-if="c" style="display:none">RegionIn</span><span data-if="cpp" style="display:none">RegionIn</span><span data-if="com" style="display:none">RegionIn</span><span data-if="dotnet" style="display:none">regionIn</span><span data-if="python" style="display:none">region_in</span></code></b> (input_object)  </span><span>region <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="c" style="display:none">Hobject</span></span>
</div>
<p class="pardesc">Region in which the lines are to be matched.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="RegionLines" class="parname"><b><code><span data-if="hdevelop" style="display:inline">RegionLines</span><span data-if="c" style="display:none">RegionLines</span><span data-if="cpp" style="display:none">RegionLines</span><span data-if="com" style="display:none">RegionLines</span><span data-if="dotnet" style="display:none">regionLines</span><span data-if="python" style="display:none">region_lines</span></code></b> (output_object)  </span><span>region(-array) <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="c" style="display:none">Hobject *</span></span>
</div>
<p class="pardesc">Region array containing the matched lines.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="AngleIn" class="parname"><b><code><span data-if="hdevelop" style="display:inline">AngleIn</span><span data-if="c" style="display:none">AngleIn</span><span data-if="cpp" style="display:none">AngleIn</span><span data-if="com" style="display:none">AngleIn</span><span data-if="dotnet" style="display:none">angleIn</span><span data-if="python" style="display:none">angle_in</span></code></b> (input_control)  </span><span>hesseline.angle.rad(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">MaybeSequence[float]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Angles (in radians) of the normal vectors of the
input lines.</p>
<p class="pardesc"><span class="parcat">Value range:
      </span><code>-1.5707963
          ≤
        
    <span data-if="hdevelop" style="display:inline">AngleIn</span>
    <span data-if="c" style="display:none">AngleIn</span>
    <span data-if="cpp" style="display:none">AngleIn</span>
    <span data-if="com" style="display:none">AngleIn</span>
    <span data-if="dotnet" style="display:none">angleIn</span>
    <span data-if="python" style="display:none">angle_in</span>
    
          ≤
          3.1415927</code></p>
</div>
  <div class="par">
<div class="parhead">
<span id="DistIn" class="parname"><b><code><span data-if="hdevelop" style="display:inline">DistIn</span><span data-if="c" style="display:none">DistIn</span><span data-if="cpp" style="display:none">DistIn</span><span data-if="com" style="display:none">DistIn</span><span data-if="dotnet" style="display:none">distIn</span><span data-if="python" style="display:none">dist_in</span></code></b> (input_control)  </span><span>hesseline.distance(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">MaybeSequence[float]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Distances of the input lines form the origin.</p>
<p class="pardesc"><span class="parcat">Number of elements:
      </span>DistIn == AngleIn</p>
</div>
  <div class="par">
<div class="parhead">
<span id="LineWidth" class="parname"><b><code><span data-if="hdevelop" style="display:inline">LineWidth</span><span data-if="c" style="display:none">LineWidth</span><span data-if="cpp" style="display:none">LineWidth</span><span data-if="com" style="display:none">LineWidth</span><span data-if="dotnet" style="display:none">lineWidth</span><span data-if="python" style="display:none">line_width</span></code></b> (input_control)  </span><span>integer <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">int</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (integer)</span><span data-if="dotnet" style="display:none"> (<i>int</i> / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>Hlong</i>)</span><span data-if="c" style="display:none"> (<i>Hlong</i>)</span></span>
</div>
<p class="pardesc">Widths of the lines.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>7</p>
<p class="pardesc"><span class="parcat">Value range:
      </span><code>1
          ≤
        
    <span data-if="hdevelop" style="display:inline">LineWidth</span>
    <span data-if="c" style="display:none">LineWidth</span>
    <span data-if="cpp" style="display:none">LineWidth</span>
    <span data-if="com" style="display:none">LineWidth</span>
    <span data-if="dotnet" style="display:none">lineWidth</span>
    <span data-if="python" style="display:none">line_width</span>
    </code></p>
</div>
  <div class="par">
<div class="parhead">
<span id="Thresh" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Thresh</span><span data-if="c" style="display:none">Thresh</span><span data-if="cpp" style="display:none">Thresh</span><span data-if="com" style="display:none">Thresh</span><span data-if="dotnet" style="display:none">thresh</span><span data-if="python" style="display:none">thresh</span></code></b> (input_control)  </span><span>integer <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">int</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (integer)</span><span data-if="dotnet" style="display:none"> (<i>int</i> / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>Hlong</i>)</span><span data-if="c" style="display:none"> (<i>Hlong</i>)</span></span>
</div>
<p class="pardesc">Threshold value for the number of line points in
the region.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>100</p>
<p class="pardesc"><span class="parcat">Value range:
      </span><code>1
          ≤
        
    <span data-if="hdevelop" style="display:inline">Thresh</span>
    <span data-if="c" style="display:none">Thresh</span>
    <span data-if="cpp" style="display:none">Thresh</span>
    <span data-if="com" style="display:none">Thresh</span>
    <span data-if="dotnet" style="display:none">thresh</span>
    <span data-if="python" style="display:none">thresh</span>
    </code></p>
</div>
  <div class="par">
<div class="parhead">
<span id="AngleOut" class="parname"><b><code><span data-if="hdevelop" style="display:inline">AngleOut</span><span data-if="c" style="display:none">AngleOut</span><span data-if="cpp" style="display:none">AngleOut</span><span data-if="com" style="display:none">AngleOut</span><span data-if="dotnet" style="display:none">angleOut</span><span data-if="python" style="display:none">angle_out</span></code></b> (output_control)  </span><span>hesseline.angle.rad(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">Sequence[float]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Angles (in radians) of the normal vectors of the
selected
lines.</p>
<p class="pardesc"><span class="parcat">Number of elements:
      </span>AngleOut <= AngleIn</p>
<p class="pardesc"><span class="parcat">Value range:
      </span><code>-1.5707963
          ≤
        
    <span data-if="hdevelop" style="display:inline">AngleOut</span>
    <span data-if="c" style="display:none">AngleOut</span>
    <span data-if="cpp" style="display:none">AngleOut</span>
    <span data-if="com" style="display:none">AngleOut</span>
    <span data-if="dotnet" style="display:none">angleOut</span>
    <span data-if="python" style="display:none">angle_out</span>
    
          ≤
          3.1415927</code></p>
</div>
  <div class="par">
<div class="parhead">
<span id="DistOut" class="parname"><b><code><span data-if="hdevelop" style="display:inline">DistOut</span><span data-if="c" style="display:none">DistOut</span><span data-if="cpp" style="display:none">DistOut</span><span data-if="com" style="display:none">DistOut</span><span data-if="dotnet" style="display:none">distOut</span><span data-if="python" style="display:none">dist_out</span></code></b> (output_control)  </span><span>hesseline.distance(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">Sequence[float]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Distances of the selected lines from the origin.</p>
<p class="pardesc"><span class="parcat">Number of elements:
      </span>DistOut == AngleOut</p>
<p class="pardesc"><span class="parcat">Value range:
      </span><code>0
          ≤
        
    <span data-if="hdevelop" style="display:inline">DistOut</span>
    <span data-if="c" style="display:none">DistOut</span>
    <span data-if="cpp" style="display:none">DistOut</span>
    <span data-if="com" style="display:none">DistOut</span>
    <span data-if="dotnet" style="display:none">distOut</span>
    <span data-if="python" style="display:none">dist_out</span>
    </code></p>
</div>
<h2 id="sec_result">结果</h2>
<p>该算子 <code><span data-if="hdevelop" style="display:inline">select_matching_lines</span><span data-if="c" style="display:none">select_matching_lines</span><span data-if="cpp" style="display:none">SelectMatchingLines</span><span data-if="com" style="display:none">SelectMatchingLines</span><span data-if="dotnet" style="display:none">SelectMatchingLines</span><span data-if="python" style="display:none">select_matching_lines</span></code> 返回值 <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
    
if the input is not empty.
The behavior in case of empty input (no input regions available) is
set via 该算子 <a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system('no_object_result',&lt;Result&gt;)</span><span data-if="c" style="display:none">set_system("no_object_result",&lt;Result&gt;)</span><span data-if="cpp" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="com" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="dotnet" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="python" style="display:none">set_system("no_object_result",&lt;Result&gt;)</span></code></a>,
the behavior in case of empty region is set via
<a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system('empty_region_result',&lt;Result&gt;)</span><span data-if="c" style="display:none">set_system("empty_region_result",&lt;Result&gt;)</span><span data-if="cpp" style="display:none">SetSystem("empty_region_result",&lt;Result&gt;)</span><span data-if="com" style="display:none">SetSystem("empty_region_result",&lt;Result&gt;)</span><span data-if="dotnet" style="display:none">SetSystem("empty_region_result",&lt;Result&gt;)</span><span data-if="python" style="display:none">set_system("empty_region_result",&lt;Result&gt;)</span></code></a>.
If necessary an exception is raised.</p>
<h2 id="sec_predecessors">可能的前置算子</h2>
<p>
<code><a href="hough_lines.html"><span data-if="hdevelop" style="display:inline">hough_lines</span><span data-if="c" style="display:none">hough_lines</span><span data-if="cpp" style="display:none">HoughLines</span><span data-if="com" style="display:none">HoughLines</span><span data-if="dotnet" style="display:none">HoughLines</span><span data-if="python" style="display:none">hough_lines</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
<!--OP_REF_FOOTER_START-->
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